“FLAT CLINCH” Series used for paper coin holders. A regular stapler leaves two bowed arches on the back of each staple. These bows can catch on the surface of coin holders or even tear the window of other paper 2×2 holders. For years, numismatists had to use plyers to laboriously flatten each staple with needle nosed plyers. The flat clinch stapler ensures each staple lies flat, eliminating the time-consuming task of flattening each staple.